261875876 has 6 divisors (see below), whose sum is σ = 458282790. Its totient is φ = 130937936.

The previous prime is 261875839. The next prime is 261875909. The reversal of 261875876 is 678578162.

It can be written as a sum of positive squares in only one way, i.e., 248377600 + 13498276 = 15760^2 + 3674^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32734481 + ... + 32734488.

It is an arithmetic number, because the mean of its divisors is an integer number (76380465).

Almost surely, 2^261875876 is an apocalyptic number.

It is an amenable number.

261875876 is a deficient number, since it is larger than the sum of its proper divisors (196406914).

261875876 is a wasteful number, since it uses less digits than its factorization.

261875876 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65468973 (or 65468971 counting only the distinct ones).

The product of its digits is 1128960, while the sum is 50.

The square root of 261875876 is about 16182.5793988474. The cubic root of 261875876 is about 639.7817256954.

The spelling of 261875876 in words is "two hundred sixty-one million, eight hundred seventy-five thousand, eight hundred seventy-six".